Island



(No Model.) 3 Sheets-Sheet 1.

A. H. MORTON.

GRINDING MACHINE.

No. 439,418. Patented O0t.28, 1890.

(No Model.) 3 Sheets-Sheet 2.

. A.v H. MORTON.

GRINDING MACHINE.

N0. 439,418. Patented 0013.28, 1890.

(No Model.) 3 Sheets-Sheet 3.

A. H. MORTON.

GRINDING MACHINE.

No. 439,418. Patented 0013.28, 1890.

WZ'TNE55E5.' INVENTDH.

UNITED STATES PATENT OFFICE.

ALBERT H. MORTON, OF PROVIDENCE, RHODE ISLAND.

GRINDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 439,418, dated October 28, 1890.

Application filed June 23, 1888.

To all whom it may concern.-

Be it known that I, ALBERT II. MORTON, a resident of the city of Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvementsin Grinding-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specifieation.

My invention relates to the class of grinding-machines in which the grinding-wheel is caused to travel across and grind the object presented for its action, and is particularly applicable to card-grinding machines.

In the drawings forming part of this specification, Figure 1 is a front view of my improved device constructed to be used for grinding the card-teeth of a carding-machine. Fig. 2 is a top view of the same. Fig. 3 is an enlarged section taken on the line 3 3 of Fig. 2, to more clearly show the operating mechanism. Fig. 4 is any end view of the device, the screw shaft and bearing being shown in section, the section being taken on lines 4; 4 of Fig. 3. Fig. 5 is a sectional view taken on the lines 5 5 of Fig. 3. Fig. 6 is a sectional view taken on the line 6 6 of Fig. 3. Fig. 7 is a sectional view taken on the line 7 7 of Fig. 3. Fig. 8 is a side view of my adjustable stop for regulating the distance to be traveled by the emery or other grinding surface mounted on the carriage. Fig. 9 is an enlarged sectional view showing the drivinggears in connection with the leading-screw, the carriage and the bed being omitted to show the drivinggears more clearly.

In the accompanying drawings like figures of reference designate corresponding parts throughout.

Referring to the drawings, 9 designates the supportinglanges, by means of which the device is attached to the carding-machine or supported opposite to any of the well-known forms of tables for holding the work upon which the grinder is to operate.

10 designates bearings connected to and forming part of said supporting-flanges.

11 are the screw-threaded pillars, provided with the adjustingmuts 12 13, by means of Serial No. 277,991. (No model.)

which one or the other or both of the ends may be lifted or lowered.

14 is the bearing-slide, by means of which one or both of the ends may be moved up to or away from the work being operated upon.

15 16 are two set-screws that are supported in the two flanges 17 18, formed on the slide 14. Upon the set-screws 15 16 is pivotally support-ed the bed proper at the ends. By means of the screw 19, provided with the wheel 20, the bearing-slide may be moved in or out from the work and with it the end or ends of the bed proper, in the well-known manner. The pulley 21 is secured to the shaft 22 by means of a spline or the set-screw 23.

24. are the end pieces of the bed in which the shaft is supported and has its hearing. A long bearing is given to the shaft 22 to prevent any spring of the shaft and to more thoroughly support it.

25 is the bed proper of the device, upon which is supported the reciprocating carriage 26. Upon the said carriage is mounted the sleeve-piece or wheel 27. This sleeve carries the emery or other grinding surface 28. The end piece 29, having abearing on the carriage by means of the flange at one end and provided with the gear at the other end, (shown in Fig. 5 partly in full view and partly in dotted lines,) is also mounted on the carriage 26 and is secured to the sleeve-piece 27 by means of one or more screws 31.

Upon the central portion of the shaft 22 are formed the screw 32 and the two grooves 33 and 34. The gear is driven by means of two keys 40, that are fast on the gear 35, and enter the grooves and 34 in the shaft. The gear 36, which intermeshes with the gear 35, is formed at one end of the shaft 37. At the other end of said shaft are attached the two gears 38 and 39, the gear 38 intermeshing with the gear 30. By this means rotary movement is given to the grinding-surface 28. As will be seen, upon power being supplied to the pulley 21, the shaft 22, provided with the screw and the grooves, is caused to revolve and with it the gear 35, by reason of the keys 40, which enter the grooves 33 34, and as gear 35 intermeshes with the gear 36 said gear 36 is revolved, and with it the shaft 37 and gears 38 and 39, and as gear 38 intermeshes with the gear 30 formed upon the inner end of the end piece 29, the said end piece 29 and the sleeve-piece 27, carrying the grinding-surface, will be caused to revolve.

Mounted on the shaft 22 and screw-threaded to fit the screw 32 is the nut 41. This nut is secured to the upwardly-extending part 42 of the carriage 26 by the half-collar or key-piece 43 and screw 44, as is clearly shown in Fig. 6. It will be seen that by reason of the nut 41 being attached to the upwardly-extending part 42 of the carriage by the half-collar or key-piece 43, the nut and carriage will travel in the same direction upon power being applied to the nut 41 through the screw 32 and the intervening gearing. Loosely mounted on the nut 41 is the gear 45, intermeshing with the gear 38, and the gear 46 intermeshing with the gear 39. The ring 47 is placed between the two gears 45 and 46 to separate them. On this ring 47 the circular clutch 48 is mounted, a clutch-face being formed in the two gears 45 and 46. A key 49, secured to the nut 41 and passing through the ring 47,- enters a groove 50 cut in the clutch 48, as shown in Fig. 5. The ring 51,secured to the nut 41 by the screw 52, holds all the parts mounted on the nut in position. The plate is formed to encircle the screw 32, and is secured to the carriage 26 by the screw 61. (Shown in section in Fig. 7.) The object of this plate 60 is to hold the gear 35 in position on the screw 32. The forked piece 53 is seated in the groove 55, formed in the clutch 48, and is provided with the pin 54, extending out beyond the line of each side of the carriage 26.

The object of the pin 54 is to move the clutch outof contact with the gear 45 and in to contact with the gear 46, and thereby reverse the direction of travel of the grinding-surface. This is accomplished by the pin 54 coming in contact with the flange 56, formed at the end of the bed 25, or in contact with the rounded portion 57 of the removable stop 58. This stop 58 is provided with the thumbscrew 59, whereby the stop can be adjusted to any part of the bed 25 or entirely removed.

The method of communicating longitudinal motion to the carriage 26 differs from that usually employed,in that instead of rotating the screw in alternately-opposite directions through a fixed or relatively-stationary nut, both the nut and screw rotate in the same direction, but at different velocities. By this construction great stiffness and rigidity are secured, as the bed can be made of any desired strength, thereby forming a true and rigid guide for the grinder, and consequently a true surface on the object ground with the same. The stationary bed also forms a protection to the driving mechanism and shields the same against injury from dust and accidents.

The operation of the device is as follows: Upon power being applied to the pulley 21 the shaft 22, provided with the screw 32 and grooves 33 and 34, is caused to revolve and with it the gear 35, by reason of the keys 40, which enter the grooves 33 and 34, and as gear 35 intermeshes with the gear 36 said gear 36 is revolved, and with it the shaft 37 and gears 38 and 39, and as gear 38 intermeshes with gear 30 the grinding-surface 28 will be caused to revolve; but it will also be seen that gear 38 meshes with gear 45, which is firmly held to the nut 41 by means of the clutch 48, and as gear 45 is caused to revolve a greater number of times than the screw 32 the nut 41 is caused to revolve on the screw and to longitudinally move the carriage on the bed, the gear 46, intermeshing with the gear 39, meantime running free on the nut. Upon the carriage arriving at the limit of its travel and the pin 54 coming in contact with the flange 56, the fork 53, and with it the clutch 48, are moved out of contact with the gear 45 (thereby allowing gear 45 to run free) and into contact with gear 46, securely looking the gear to the nut, and as gear 46 is caused to revolve a less number of times than the screw the nut is held as if it were stationary, thereby producing a longitudinal.

movement of the carriage 26 in an opposite direction.

The operation may perhaps be better shown by assigning a definite number of revolutions to the screw and noting the resultant longitudinal motion communicated to the carriage. Assuming the screw to make six hundred revolutions, the ratio and arrangement of the gearing is such that one of the clutch-gears makes seven hundred and the other five hundred revolutions in the same time and in the same direction as the screw. The clutch being loosely fitted on the nut and connected thereto by a key can be moved into engagement with either of the clutch-gears by means of the fork, therebyimparting the same speed to the nut as that of the clutch-gear with which the clutch is engaged. With the nut making seven hundred revolutions and the screw six hundred, the resultant longitudinal motion of the carriage would be the same as though the screw were stationary and the nut made the difference between seven hundred and six hundred, or one hundred, revolutions. This longitudinal motion carries the carriage to one end of the bed, where the pin connected to the fork, coming in contact with the flange on the bed, engages the clutch with the clutch-gear making five hundred revolutions. The speed of the nut now being reduced to five hundred revolutions, the resultant longitudinal motion of the carriage is the same as though the nut were stationary and the screw made the difference between six hundred and five hundred, or one hundred, revolutions. The direction of the rotation of the screw remaining the same, this would produce longitudinal motion of the carriage in a direction opposite to that previously cited, which would carry the carriage to the opposite end of the bed, where the pin, coming in contact with the flange on the bed,

would again, through the fork, engage the clutch with the clutch-gear making seven hundred revolutions, and the motions above described would be indefinitely repeated.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a grindingmachine, the combination of the stationary bed, the screw in the axial center of the bed revolving constantly in one direction, the nut and intervening gearing, whereby the grinding-surface is given a rotary and reciprocating movement, substantially as described.

2. In a grinding-machine, the combination of the fixed bed, the screw in the axial center of the bed revolving constantly in one direction, the nut, the clutch, the clutch-gears, and the gearing for giving rotary motion to the grinding surface, substantially as described. I

3. In a grinding-machine,t11e combination of the stationary bed, the screw in the axial center of the bed revolving constantly in one direction, the nut, the clutch, the clutch-gears, the gear revolving with the screw, and the intervening gearing whereby the grinding-surface is caused to revolve and a reciprocating movement is also given to it, substantially as described.

4. In a grinding-machine, the bed 25, the carriage 26, the sleeve piece 27 mounted thereon, and the part 29, in combination with the screw 32, carrying the gear 35, intermeshing with the gear 36, connected to the gears 38 39, in combination with the nut 41, carrying the gears 46, and the clutch 48, by means of which one or the other of said gears is locked to the nut 41 and said nut caused to revolve with the locked gear, substantially as and for the purpose herein shown and described.

5. In combination, the screw 32, the nut 41, the gears 45 46, the ring 47, the fork 53, provided with the pin 54, the gears 38 39, mounted on the shaft 37, provided with the gear 36, the gear 35, revolving with the screw 32 of the carriage 26, the part 29, provided with the gear 30, and the sleeve-piece 27, substantiallyas and for the purpose herein shown and described.

' 37, provided with the gear 36, the gear 35, having keys 40, sliding in the grooves 33 and 34 on the screw 32 of the carriage 26, having mounted thereon the sleeve 27 and end piece 29, provided with the gear 30, all substantially as herein shown and described.

8. In a grinding-machine, a stationary bed and a carriage reciprocated by a screw located Within the bed and supporting a rotating grinding sleeve or wheel, substantially as described.

9. In a grinding-machine, a stationary bed, a carriage provided with a grinding sleeve 01' wheel, and a screw located Within the bed for conveying rotary motion to the sleeve or wheel and longitudinal movement to the carriage, substantially as described.

In witness whereof I have hereunto set my hand.

ALBERT I-I. MORTON.

Witnesses:

WILLARD T HATCH, JosEPH A. MILLER, J r. 

